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Ski 100, Thermal Underwear Base Layer Top, Kids'
A warm ski base layer with brushed component, flat seams, and stretch knit for added comfort.
Free returns
Free shipping over $35
Free pickup
San Francisco, 735 Market St. Options
Select an available color and size to see options.
Product Videos
Product Features

Moisture wicking
LOW: component providing moisture wicking and low-level drying.
Warmth
HIGH: brushed lining for warmth.
Odor control
LOW: the polyester fiber has a low odor-reducing capacity.
Softness
Knitted with very soft thread for extra comfort and softness.
Product Customer Reviews

Very satisfied!
Good quality
This fits my 9 year old kid well. It stretches a little. If your child 9-10 years old and is above average size, you might try the next size up.
Great product
Hello Megan,
Thank you for leaving a review about this product.
Always nice to hear that our customers love their new acquisitions 😉
Have a lovely day,
Decathlon Calgary Team
It's not bad to wear as an inner, but it creates a lot of fluff. It's cheap so just wear it.
Hello Jieun,
Thank you again for your comment on this item. This material is very sensitive to high heat. In order to avoid fluff, i suggest a delicate wash on the washing machine and avoid the tumble dryer. I hope this can fix the fluff issue.
We remain available if you have other comments on this product.
See you in store !
Laurane
Great fit ! Very warm and kept us dry as we snow tubed
Great long sleeve warm shirt for winter. My daughter loves wearing them under a sweatshirt or sweater to keep her warm without the bulk. Washes well and doesn’t shrink or lose its shape. We have bought one for every day of the week!
Kept my child nice and warm
The fit is quite small. Size up if you want it to last.
Soft finish, good fit super price for growing kids. Highly recommended
Grandson so happy with this top he was on an outward bound with school and wore it found it comfy and warm
For child who feels hot always it is perfect don’t need more layer.
Great product
I use this all winter for kids to wear under uniforms. I can’t imagine my kids not wearing this in times of Covid when there is constant venting in classes.
Lovely top though, feels great, just be aware of sizes. Size is very small. eg. 14 years size is more like a 10/11 year old for average child/youth. Get one to two sizes bigger.
Size Guide

Additional Product Information
Composition
Main fabric
- 100% Polyester cationic
What is the fit of the kids bl 100 base layer?
The KIDS BL 100 base layer is cut to provide a REGULAR fit. It's a classic straight cut that fits every body shape.
What are the benefits of polyester?
Polyester is the most-used fiber for base garments because it is relatively inexpensive and offers excellent performance in various respects, and especially because the fibers can be knitted to obtain a very lightweight and durable fabric. It actively absorbs moisture but does not dry particularly well when wet. It is limited in its ability to reduce odors.
How should kids dress to ensure they keep warm on the slopes?
To make sure you stay warm and dry, we recommend using the 3-technical-layer rule: Layer 1 or a 2nd skin, to stay dry. Layer 2 or an insulating layer, to keep the heat in. Layer 3 or a protective layer, to protect against bad weather.
A product-specific environmental rating
The product's environmental footprint is calculated for its entire life using various indicators. An overall score from A to E is given to help you easily identify the most eco-friendly products by comparing products of the same type (T-shirts, pants, backpacks, etc.)
Origin
Imported
Product testing
All Wedze products are created, designed, and developed in the Mont Blanc Valley. They are then tested under the same conditions as you would experience in real-life use (snow, cold, powder snow, etc.). The design teams ensure that the program for which the product has been designed and developed matches perfectly with its use in the field.
Storage instructions
Dry thoroughly before storing.
Care instructions
Wash before first use. Machine wash at 30°C. Synthetic cycle. Turn inside out. Dry flat in a well ventilated place. Do not tumble dry. Do not dry clean. Do not iron. Do not place on a radiator.
Superior quality. Unbeatable prices.
For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.
Decathlon makes the difference
-
Research and development
delivers high-quality cost-effective products
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State-of-the-art production processes
minimize manufacturing costs
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Optimized supply chain
reduces retail prices
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Minimal retail footprint
lowers overhead and indirect costs

Ski 100, Thermal Underwear Base Layer Top, Kids'
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Heavy products return policy
If you return a product you will receive a refund for the purchase price plus any applicable sales taxes, less any non-refundable charges.
Decathlon will cover all shipping costs associated with your return except for items excluded from our return policy such as bikes, basketball hoops, snowboards, surfboards, tents, and other larger / heavier items.
Return costs for heavy products:
Weight Thresholds | Shipping within California | Shipping outside of California |
---|---|---|
> 9 lbs | $20.00 | $25.00 |
> 30 lbs | $50.00 | $65.00 |
> 100 lbs | $100.00 | $125.00 |
> 200 lbs | $200.00 | $230.00 |
If you return a product at any of our store locations, we will gladly help you find the best alternative product or refund you on the spot.
